Grate



, 5 Sheets-Sheet 2. J H. KNOX.

GRATE.

(No Model.)

No. 416,789. Patented 1360.10, 1889.

lllll l1 N. PETER "Mo-Lithograph WnhinlmyD 'C- WITNESSES.

J. H. KNOX.

(No Model.)

5 Sheets-Sheet 3.

GRATE.

Patented Dec. .10, 1889,

INVENTOR.

WITNESSES.

5 Sheets-Sheet- 4.

J.H.KNOX.

(,No Model.)

GRATE.

Patented Dec. 10, 1889.

NYENTOR.

J. H. KNOX.

5 Sheets-Sheet 5..

GRATB.

(No Model.)

INVENLFOR.

Patented Dec. 10, 1889.

N. Pmrns. Photo-DWI. Wahhmon m;

' III III of Fig. 1.

UNITED STATES PATENT OFFICE.

JOHN H. KNOX, OF ALLEGHENY, PENNSYLVANIA.

G RATE.

SPECIFICATION forming part of Letters Patent No. 416,789, dated December 10, 1889.

Application filed May 18, 1889. Serial No- 31l,220. (No model.)

T0 at whom it may concern.-

Be it known that 1, JOHN H. KNOX, of Allegheny, in the county of Allegheny and State offPennsylvania, have invented a new and useful Improvement in Grates, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a plan View of my improved grate. Fig. 2 is a front end View thereof. Fig. 3 is a vertical cross-section on the line Fig. 4 is a side elevation of the grate. Fig. 5 is a vertical longitudinal section on the line V V of Fig. 1. Fig. 6 is an irregular vertical longitudinal section on the line VI VI of Fig. 1. Fig. 7 is a vertical longitudinal section on the line VII VII of Fig. 1, showing the operation of tipping one of the grate-sections'without the others.- Fig. 8 is a side elevation of part of the grate, showing the manner of operating the mechanism to permit tipping of one of the sections. is a side elevation of the grate with part of the frame -work broken away, showing the grate-sections in a tipped position.

Like symbols of reference indicate like parts in each.-

As shown in the drawings, the grate consists of a number of oscillatory sections 2,

provided at the ends with trunnions or jour-.

nals 3, which are set .in' vertically-removable bearings a in the grate frame or setting 5. Each section preferably consists of a single grated casting the surface of which is of convex form, the transverse grates or bars being, forfthe purpose of strength, united at the middie by connecting-webs o. By reason of the convex or peaked form of the sections the ashes or clinkers tend to descend to the bases of the in:

Fig. 9

sections are adapted to fit between the teeth at the ends of the frame, the pu rpose of which is that as the sections are oscillated the ashes and clinkers shall be ground up and discharged from the grate to the ash-pit. The bars or gratings of the sections are made with convex or rounded surfaces, the purpose of which is to prevent the accumulation thereon of molten cinder or clinkers, which would be apt to choke the grate, and the formation of which is always a matter of serious consequence in coal-furnaces. The sections of the grate are oscillated by means of a transverse rack-bar 6, having teeth 7, which mesh with series of teeth formed on the bases of the sections. The teeth of the rack-bar are made open laterally, and are preferably inclined down wardly and outwardly, so as to prevent the lodging of cinders therein and the consequent choking of the operating mechanism.

The rack-bar may conveniently be supported on rollers 8, journaled on depending the grate-frame, so that it may be moved to one side out of the path of the lever to permit simultaneous dumping of all the gratei sections, as will be hereinafter explained.

In order that the clinkers and cinders not removed by ordinary shaking of the grate may be cleared therefrom without discharging the entire burden of the grate and drawing the fire, I have provided means by which one of the sections may be overturned or dumped without necessarily dumping the remainder. It is preferable in most cases that the front section of the grate should beso arranged that before dumping the clinkers may be drawn by the fireman to the front of the fire-box. To this end the portion of the. rack-bar pertaining to the front grate-sec- 'on the front grate-section.

tion is not made in a continuous piece with the rest of the bar, but is pivotally connected thereto by a pin 15, on which it may be dropped out of engagement with the teeth To permit this motion of the pivoted end of the rack-bar, the link 12 is connected at the end with the lever 10 by a detachable connectionsuch as removable pin 16-and to support this section of the rack-bar in the ordinary operation of the grate I employ a hooked bar 17, which fits under and supports the same, but is movable, so that it may be disengaged therefrom. The front grate-section is also provided with special means for upsetting it, consisting in a lever 18, connected detachably by a link 19 with a lug or projection 20 on said section.

The operation of the grate in upsetting one section only is as follows: The front pivoted end of the rack-bar 6 is disengaged from the cogs or teeth of the front section by drawing back the hooked support 17, disconnecting the link 12 from the lever 10, and then dropping the end of the rack-bar on the pivot 15. The front grate-section is then disconnected from the rack-bar, as shown in Fig. 8, and may be upset, as shown in Fig. 7, by means of the lever 18, so as to discharge into the ash-pit the clinkers and cinfireman upon the front part of the grate. This section may then again be connected with the rack-bar by tilting it into its normal position and then elevatingv the rackbar section and upholding it by the hooked support 17.

The detachable connection between the link of ways, such as will suggest themselves to the skilled mechanic. It is also possible to dispense with such detachable connection by extending the link 12 and connecting it to an eye formed on the rear portion of the rackbar, as shown by dotted lines in Fig. 4. In such case the link need not be detached from the lever 10 in order to disconnect the end of 20 on the front gratesection, the stop 13 is moved to one side, and then by motion of the lever 10 toits full-extent all the sections may and coal, as clearly shown in Fig. 6.

ber, as will be readily understood, and the grate-sections are so constructed and arranged that any or all of them may easily be removed from the frame 5 for the purpose of cleaning or repair.

The advantages of my invention will be appreciated by those skilled in the art.

The grate is applicable to many uses-such as in the fire-chambers of steamboats, locomotives, and furnaces of different kinds and the construction is such that it lessens very materially the labor of cleaning the firechamber from cindersand clinkers and largely prevents the formation of the latter.

The apparatus may be modified in many ways by the skilled mechanic within the scope of my invention, as stated'in the following claims, and although I have shown apparatus which, as a whole, possesses many features of advantage, yet the different parts thereof as claimed by me separately herein may be used with advantage in other combinations of elements.

I claim 1. In a grate, the combination of a series of oscillatory sections and mechanism by which they may be rocked, one at least of said sections being connected detachably with said mechanism to permit independent dumping or overturning thereof, substantially as and for the purposes described.

ders which have already been drawn by the 2. In a grate, the combination of a series of oscillatory sections and a rack-bar by which ;they may be rocked, said rack-bar being pro- .vided with a jointed or pivoted portion which may be disengaged from one at least of the sections to permit independent dumping or overturning thereof, substantially as and for the purposes described.

12 and lever 10 may be arranged in a variety 1 3. In a grate, the combination of a series of oscillatory sections, mechanism by which they imay be rocked, one at leastof said sections being connected detachably with said mechianism to permit independent dumping or overturning thereof, and an operating-lever connected with such section and adapted to dump the same, substantially as and for the purposes described. the rack-bar from the front gratesection, the

4:. In a grate, the combination of aseries of oscillatory sections, a rack-bar by which they may be rocked, said rack-bar being provided with a jointed or pivoted portion which may be disengaged from one at least of the sections to permit independent dumping or overturning thereof, and a support for the jointed portion of the rack-bar, substantially as and for the purposes described. be tipped to discharge their burden of cinder In testimony whereof I have hereunto set my hand this 14th day of May, A. D. 1889.

JOHN H. KNOX.

Witnesses:

W. B. CoRwIN, THOMAS W. BAKEWELL. 

